Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e69ca8e3c367c58183e89ce0b5284d4f974682ec8517736b1f6389cd9ef1a613' 
  AND token = 'T7NwUkekyrDVuEGRhJNAzu8YkC+bd+1tRTjlVT9npBY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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