Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c53cd563846964198f305b15d7d5c237887442c7c8282e811b5b4d0bcfba3c94' 
  AND token = 'PtoV9bCF7H2Pp6Iz2R42Ab8KAQY6q4J410yBkCBat+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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