Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f267e903bc4f7b7164c73cf6a7554ae07109c4b97674aeb1a67c7f1b7b462f73' 
  AND token = 'thrBEbJLEwU2V7KGFMx81WYTkKkn/t0CXD34NECJNwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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