Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56d1e7511c13608e4e56b2d748e1c2423f2751d270ab773d156d6320a6c8731d' 
  AND token = 'jfJUcpB6RZOwf4gwWMi5QmL/2dzLUS6HhutC4u2OLwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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