Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6098ea55505544a43133d0ecf8ca9c75585ba05edee87c1accde888f1ab96975' 
  AND token = 'xw+xlSUM7FiaQkS6FJAnfT9jhH5S0Hdh2wZdtINe3Lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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