Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f053628178bd388925a40644f9597f24f00e3ad977c416a367e5576646045cd' 
  AND token = 'aWlLh7ALfgN39g8auVSa800LWyrqu+vESt1sRwsFqto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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