Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd64a32cc348ba4da2ad4036b8e800aebec8ca9cf8bf26c37e4f6e3de5841f271' 
  AND token = 'RfhaAk3kV9+eSo73m8PbbMYPNiw7QCqgdVkRxvuaZNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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