Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00c25a2187fcec9f889f3229192f03149330614287b075f1b4147ab791a1c1a8' 
  AND token = '14q1e8kg08FQp7/eBTalWuunshwV4k/qc1UD61nFPdw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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