Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b16fbec2cf8e95ee7ff8df62037087766aa03be593d6c2c27d66a97ba45f066' 
  AND token = 'xecF2FRFk23Q3dNortVL1mLxyNzyTi5NRajFsJwNm+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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