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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '057c12627f224a56e7895311040928449dea0d156a0636bcf880dca721167242' 
  AND token = '5CvP0k14hjbaLxiQerNCN6YTpm37CCbRgQXst50VWgc=' 
  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"
    }
  }
}