Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6574509063ba9ceca2a36138d04e28e22e5217ea264956f80b607ab9cba733a' 
  AND token = 'EHEATaUMc56QBw0+fLgWC3+Lmi8IZy9fUFp81W4Yi24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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