Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2f0d5d64716374d169dbb6b3628b25f7886437153447133d90d7f9b6addea06' 
  AND token = 'NXXcQxNS/9sRgc0ku8FaVeXkUNMaQPqx9WHp4L6EVEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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