Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5c363d2379637efa5ecbdca1ce0020be972bf2997e1a91efdbe8bebb99c3737' 
  AND token = '2NMdXJLyjG1sVGaoXvW7NKS6NRDq1ze29Ay7LkVp7Ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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