Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42fb63658f96184b9deec30f81a37ae72b5d752fb908b014921b96f3e7f4eda2' 
  AND token = 'xtAgxqE7odI2c4u2PFrfHUIZTv0WBP4rjXrrniQRXYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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