Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4938efd2a9726dd947bb9270fbdb3a7a81de251f640211a033e550f3156bb1f5' 
  AND token = 'kw9q8DLZLy9Up9rL6953zkFqeUJo57Lqbf9PUCzoTE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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