Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10af486bb996be5ef71f8caaf90021469da907fe9c477414979442b7dedf901b' 
  AND token = 'zAyonxlQiP8Z8hhYtdP2nO6jdiSiIA15tXaL1GVU4TM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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