Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c5bc2bc9816162b2fc9c48f7ab6f6802074f50de6127f805cd04b9d97e357d2' 
  AND token = 'Fr564Odds11s94Gsj7x6AzSK2vimwd77sqBbX1Hfr3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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