Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9694c92dfb9878de6d65d72e6c0f30834ddfd83cc5420efd0dd787931bba499d' 
  AND token = 'oxK0cNWR2i7f/8s4tj6vheSGiF19EbnkvGcpxRTTF2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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