SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26a2217fa15c37a09d09a5cc62b9f72444f63c4c5e36252ccc80cf0107a7c25a' 
  AND token = 'JsVZjq88Re77txzFWkzvA5YdP/3LjJKeiShgGEynFTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}