Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9a91ac9732d067fe5cccaec8d6e455e5f533c1cefb2c56db4f11e7043bc0967' 
  AND token = 'UIZikzEdo8B+ZtAFAooi6kXD/ekue0w8GwszVnSTqHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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