Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23ee4a4232660edca9c13591921da69031ef62b864194dde478ebaa1e566b08b' 
  AND token = 'vz+HJPioL/6cHcsC/splMWTzCiG++U2WWlFcGsRqBMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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