Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e019fa61f08a458391ad987bdbab65730dff28a4eef7cba9a464723969335083' 
  AND token = 'mxBi2tizSfvAyTEwvzMOoHBGRLlUdYymQsxfFeY4Zcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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