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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd56295c55d54e068175b5c1408f2aa008a96ea89199377d8343008ac809d1a77' 
  AND token = 'Pjy/x2aZgOtXB1k9hu3MadEQn91wYIY1zPmm4DC4pRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}