Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '600d8af749db6758abe9f6ebc0c4da8dd6e9934dbea470d706794e9d6659751c' 
  AND token = '+MhFqz3TIi9jA0rYbk9PSQZ1sxoHyYRI2gqLgQUJ2/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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