Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f7dac1837cbef0845e16e42f8ed243b34c77c7d4392ece94717c15074c0151b' 
  AND token = 'QTgkzxOcQJumOldv8bBOAeHY/+3+FQ0DPqpuXe2Sn2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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