Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fa574640329af2620a372b33dd2dd01628654757bc827be8d44757d3746da0b4' 
  AND token = '1XfO59RnV8dfLELLSU1NZVtM5Iwm2RSKFYGI2K9rFqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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