SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d073e9108d6f5c489f4fdfc52385cf3d66f641972fe166e349d4952f0a854b5' 
  AND token = 'enPhIXgWaKZbGvgoRcI9+nJmSC0YYKB+g6R5iZkMiYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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