Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '282741ee56fca675faab48fcdb33b760426a7c54fa41a4fcc87aefcb5f929af8' 
  AND token = 'phgw+bstZOUdDiP2s25nJ9t6jiebJQMmoIVU86253L0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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