Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95c03f7ddc508b2dcfdd0d2e9bdd16dec096d862a850491f49a6c07ea9780bfc' 
  AND token = 'hbEBK5Uj/kwG7WX+ULa0nShXS1cCq8I7fIPYgFV3OOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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