Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bb9f74ea8aa9c2c564bea038474a9507288991b121284be588cacbbe40c85a6' 
  AND token = 'n6vpG7DNUYhowxFipPvPvlOWPa10Mn7H+mFU77QNv24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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