Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24696e4fcd23610d6bdc18c9a1d270f951722a2109fd52bff2fffb912ac64e21' 
  AND token = 'mVHLUBx5nugKK7/kFCQMvBxTXY2OdFQh6WESTMx3peg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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