Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21edafdff016bac329fcda61c87ca635be625ed3006b79a760cd0aad140311a4' 
  AND token = 'QTVdFC/G/pha8hH8EcOn/5HRgL0yoDtzr+I2NTkxUH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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