Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ad9b50c28e4e830631107a45fb0c048c93a2855bff5c6c7f25121772425d444' 
  AND token = 'rjeJABtQghiSUDY7MeygHacl9DR4pZQzQ6xEmY4gWs4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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