Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bff3253fe30b45944c2c72dfb1a0ab9d8000d4968ce0cf218462d995c5270e29' 
  AND token = 'qhOsrxrK3npdqdlhAravPEExMgoxfCOYXBCXRFv/OS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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