Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb2b01bb340810ba5744b19b3dc9c66d83c606c53595cdc2f0d9f3f16948bc72' 
  AND token = 'EkPczsHeHj1x/U5xdovwIchAfHuo3MyUqhRYX9RJm1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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