Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69f14f2da38c3acdc920797ca5927cbfe5fac1407704b2be2cbfac396fd18073' 
  AND token = '+ouh63nYvA9Cz5i8Ui5e329dLtEqKEcO+a/96YXDLpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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