Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03d9a3c9f14e237604d5fa56ed71cf89f1133c9098303c567915ef7e1c8b08e3' 
  AND token = 'xwPLc1zDXQ3TCVhodO7nDEfJ+oMPuHefmCeSHS6FTKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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