Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29ab0d095b76d8e4dd81d2ddd986cff1e0dd09a563c069ed61461c2aa47df658' 
  AND token = '/+lszZUeqzECYSHyKirtKqwumyyy3Q/2A2JrVNkXw3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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