Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c8837d6f07d56c45ddbbec4adecb02c9ce9c202607534e3c27c56d26077bcdb' 
  AND token = 'OA1d2ww3vl5TTZQbZHV82rBc5XMTxKKVMgVPw9D8gvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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