Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc6c326fcfaed299af81679cb576bcdaa006d02cae2494805a49e315595e64cb' 
  AND token = 'LlWP6R+UmMOnGQ8Xdir+A0IRDZZhCOqVcrAiv6cGkxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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