Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b00a03f090559499dd775927ef378de6b05737510b984e4129da89e7fad467ad' 
  AND token = 'ttvRaEpDM1xnQ3FOuEpd6uZt/bGqRru1A6u9r2AFeFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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