Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a807851445ba566af3bd393caf14a3a381dcbfbb8fa4306629f21873d9daa97' 
  AND token = 'ycXxc0LkvfDHfvPbqjPxxjwX6nDnfVnIqqjay7uICcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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