Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cbacb02d29cc6678cf72f3389ab8fd5e70185f3e29913c0bc5793803ac7e33b' 
  AND token = 'nUSG9XmAPUlKrCSAlH8yiqFbF6vLSBquyOw474DcT04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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