Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '019fe6598f33655c143d167ca1afa3138bf97ac5bdf57b6dd930ad12815037af' 
  AND token = 'm5y+vEwWojcPCQzaegYYRlIj2esqxlUslQqqiGxs0RM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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