Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32d9a1fa0bbf2b1455f0d5dda17d9eec8df33d274d97e408459d4f428f98a0f1' 
  AND token = 'SJQUfXIStsvfP/V4qFZRje/JybWjxC2Z5WzZ58kw9ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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