Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b50505e7ae17de94416a3eaece2d450861860f32e49f2a0272bf69f7987cfe2' 
  AND token = 'BxrK27vpov8DTZ6Z6RBCX9HAI0/Dbndh8x9Peuzme9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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