Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '931f98370378e7c26fb19c5be2f67645c002e97cb8fde6f144fe5e20aa6225a4' 
  AND token = 'niYo3cPRFbSA7gWvLuIY55/puvedkGHgs5UG934l93k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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