Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be5fe70b99d75f236b05fbde74123d4594982742f7c2b916d9dcc643d3ed3615' 
  AND token = 'dKfqy8m/oJ6aYQ3LD0IewmgDa2Kq4l2Hl95Vo/E93v0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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