Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2694c4f04e5779fe117b713eabce95bd6a14e1090291e48201c93a267851cc78' 
  AND token = '6J2m8tmc0mXKSf5YyqNHizT8pzMNUJ0p3RWYiMl3x3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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