Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '236fa5ffcbc80a835ce4254b5ae6bb9510a621d5a2ce9042ff9284300bd5100c' 
  AND token = '1S6j/ryOKze2sAWz0Tpn0uCF3mjlhasXdOTr83YbI5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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