Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9db8b11ed3711f4203510197827494507cdaae000e3621898ae4ff9ae3edce88' 
  AND token = '220+wzm+ur4Q3ejf17v4ipvNnF99gGUDfYtmk6ESBes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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