Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc5d924cae28ce094e85fc347530547890a77573fcac90de787584dc242783ff' 
  AND token = 'dco9h+scfLomnDZ8wyoESD+I5hVvtYTFgE/N/mipLzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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