Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11390e72e92ef7689c5599b26a559c6a8cdf886e4302d9eddd0f512780e6c803' 
  AND token = 'UeYwvrpY9OoolRHAfIzoMmnKk9okKh0/B9lT9pbLx7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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