Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80d51566f8e05e424166f5ce850d2613e4c9f0c648f59e025d48ead372fd9c4a' 
  AND token = 'DslcgioS8fz7MhDNgOWhU4FUx+Tp4yY96T/It0KMlrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}