SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b669a1a7c102d74d203150a466716ccd548f06a94ffa7867d7268347584e5a71' 
  AND token = 'v+pxfzkiV9IPE6wmhp6ZMj/tD9B+wwco6ZvCPhljpNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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