Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c476937960012c75f5ebc3412106317ef3c4d85bed450b556fa548a5e71ba7c1' 
  AND token = 'PAAOorbMpAYWkrpj0Xj23nJXcwZXv41DRHPm7F6xQ2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}