Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a4d13e73e2cef502eecdd62867b830c41050d2776d4ba28710174a61061cd15f' 
  AND token = 'kUoBzGkev5t2oTnoXLVAS0VuMpoPveTqhE/PQEcY8vU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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