Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63522c8cae37de6fbf7c0d62cd7c71b0cee5558f014dea2614e7988fd927c6d9' 
  AND token = '97fGDF/QEg7I+Y5C7jSuAIbLTSk8z4pMWg8OqEEugQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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