Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed4d16eee86f3edf5149d909b10cbc94e6a45d79027a3afbdf3f9d385e7b48dc' 
  AND token = 'W3S5+Y/baZD6+O5Ds1vQ50HPTpVn4q9sB0ya6wTyPU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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