Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c07f56947f60f9251ca0437a113f081e79d5fe6b68a7d494adc68821deb35a1' 
  AND token = 'Yp7kzfXfLQdVNh3BvJNix2Qbl6ZBQLYACY0ZYtW0ARg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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