Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e53383736d425a0e01d1f183f28f94e4622e2d207fb87c2e1fc5df476f960c0d' 
  AND token = '1MWCYXX9TmnCmnFnYWHnSjwWlDGZwBR8Xrw0kmz48XY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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