Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c38330fa47f71fd0521063d20601c724bb6c2fe27d8dc24791508bafe36b522c' 
  AND token = 'V9XwBWQxi4snUnMfokNNxusLeOdn7fw1hTUj1kuQEEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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