Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8ac4d747d23be3f8e729d72c1c7efc879f7fc89e464f88f481ac21bab4c02ad' 
  AND token = 'RAXZQA8l53DbDbuFkZL1akI5AAng5MuMMAkLHAPlZyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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