Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e08f58e45300dd55462f0b4e890c46db7ac47807e4f9a740b67296650a79a3aa' 
  AND token = 'NYPCYKXPVgdjujPcHCgTZk2ytj922TtnFGwAGN6eZpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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