Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da4a6310b5dec974d1e842124c1f30f4f5b5ec4268ffb7d94a9bd8f4bb3039d8' 
  AND token = '8pELPZ/xn02czG93RmPFo3CRVdX4bUeZk549cQk5f1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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