SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04aed3c8143e644612c372f19c39673828cae8984dac172a408b185c65be7dd0' 
  AND token = 'KW8qz+pxnB57pYVJuEIwUzA6MqYo4KaNROfRMzFsXI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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