Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b428b0e5c1822fe812739139617d42f2ac2ceeeca9defe1df5abc974500c6c74' 
  AND token = 'ew5ffYLaRrKCggSDBqpMPWs8dsqGOyNKycIyiMLumB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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