Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c5f363109b94619e0bd8cc557feeea870a10877f443c86f7204fab9cdeccdf8' 
  AND token = 'OUN6+4HcRcRylZCAQ9EAfk13tMOxtVbKmSnkSEdETNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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