Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb7a00e1f741654edb16cc7f9ffd5880c30bb16426ac2934a272318417f1e60b' 
  AND token = 'aZ2BZxyIj1fHmkjl6pdh6/QMPGV7W+cjZKxue6+n1wQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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