SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd772a9322c147243e63d959ceecaea000e3d1af2609219345c19725ea880d85d' 
  AND token = 'eVEQBOdBtgHcAieMlKYGBihAjJC9lgjCVaObZpK/z6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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