SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58e40ccb8df36f9268bc51f21f7a624e3f7263fd695e095498f5f405d86c5518' 
  AND token = 'uxJmQRLqK+MeCqt8bsY9D/z9+eT141m0UlFCTMQ+k0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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