SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc0cc8d3d44301b1d17d34e40afe05f21cd87382ff64ba6655aba78d3c128624' 
  AND token = 'GVNGMXpgPG1FnwHN/GllzK2Avs6UP6CjDt0aAQhjCFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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