Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7671239ca7cdd78f862536c384244d267f1946e6059502547cdeaa49a3c7573' 
  AND token = 'xqmNh8GVNHyUiA4014J3LQaF9MfMa+doVqG5kGefXww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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