SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7218ec3f5b8a5cf93577c3ca3c6f2e136442f762b3b246acbac8ce09d9833b7e' 
  AND token = 'uDOBPTQX1lJ1U8tMejs6VYZKZpOy0mO/nzTxUX9KIoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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