Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1652787e732a84061ab4dd03800a712a406eeb714808e15fc8b222ee1e9b3019' 
  AND token = 'CbzWvmKSO46xdNCENRkkw4YAxfeGW5JxwkTDW252sxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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