Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1cc217daf87f7b911c883faa30a369b7d57429b0273891fd9b234b0506ac74d' 
  AND token = '3li6t8CwCPStlPuZsdKO861exnK4swmW7bHKgVs0m1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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