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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01045449c485d9a32db152fefda3fe2ad4b44ebc2669a94467e88d99d08180d5' 
  AND token = 'HI+yA79DUcZ38ZPlqfJjHNPhEf6fQ6NwBOQQn68b6ro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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